I have had several Allett wallets and they have all been excellent. For some reason no one else combines the same qualities while still being super thin. I currently have the Sport model as I don't wear as much as I used to. I use it as a front pocket and forget it's there. If you carry a lot, consider Original. It can hold a lot of cards (I had 16) and has two cash compartments on top of each other. I haven't found any other purse like this one yet.
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